Refrigerating apparatus



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April 4, 1939. J. L GlasoN REFRIGERATINC APPARATUS origina Filed Sept. so, 1930v 2 Sheets-Sheet 2 ATTORNEY Reissued Apr. 4, 1939 UNITED STATES Re. y21,('340` mIGEBATlNG APPARATUS J. Lowell Gibson, Dayton, 0h10, asdgnor to General Motors Corporation, a corporation of Del- Original No. 2,073,741, dated March 16, 1937, Se-

rialNo. 485,448,

September 30. 1930.

Application for reissue February l0, 1939, Serial No.

'l Claims. (Cl. 62-110 This invention relates to refrigerating apparatus and more particularly to refrigerating apparatus utilizing a plurality of refrigerant circuits.

One of the objects of the present invention is to provide an improved refrigeraidng apparatus which prevents dehydration of food by the uniform cooling of a food compartment at a relatively high refrigerating temperature, and which at the same time provides a freezing lcompartment maintained at a relatively low temperature.

It is a further object to enable the accomplishment of the foregoing object and have a wide variation of temperatures between the freezing and food compartments.

Further objects and advantages of the present invention will be apparent from the following description. reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.

In the drawings:

Fig. l is a vertical view in cross-section of a refrigerating apparatus embodying features of the invention; E Fig. 2 is a fragmentary view taken in the direction of the arrows 2-2 of Fig. 1; and

Fig. 3 is a perspective view of a portion of the apparatus shown in Fig. 1.

Referring to the drawings. the numeral 26 designates, in general; a refrigeratin'g apparatus embodying features of the present invention. The apparatus 26 comprises, in general, a cabinet 22 comprising a freezing compartment 2l, a'. food compartment 26, formed by an inner metal lining 21, and a machinery compartment 28. The apparatus 26 also includes a primary refrigerating system 30 for maintaining a relatively low temperature such as for freezing. and a secondary refrigerating system 32 for the maintenance of a higher refrigerating temperature such as is suitable for refrlgerating food articles stored in the food compartment 26. Thermal heat exchange means 35 between the primary and secondary systems is provided. I'he heat exchange means 35 provides a shell 31 containing the heat exchange elements. Y

Referring more in detail to the drawings, the primary refrigerating system comprises, in general, a liquid refrigerant evaporator 46 of the ooded, float controlled type, for instance, as shown in the patent to R. G. Osborn. No. 1,556,- 708, issued Cctober 13, 1925, and a refrigerant liquefying unit 42. The evaporator 40 islocated in the freezing compartment 24 and is provided with one or more depending loops which form a freezing zone l1 adapted to house a plurality of ice-making receptacles 66. One or more of the loopslimaybeconnectedtotheshell 21toprovide a closed refrigerant circuit through the shell I1. The liquefylng unit 42 withdraws the gas- .'eous refrigerant from the evaporator il through a vapor conduit 65, liquees the refrigerant and delivers it toa supply conduit 51. The liquefylng unit is-located in the machinery compartment and includes a motor 69, compressor 66 and condenserv 6i, the 'motor being controlled in response to pressure within the conduit 66 and therefore in accordance with the. temperature of the body of liquid refrigerant in evaporator Il, by means of anfautomatic switch 66 which connects the motor with the power mains, to maintain. normally, the said temperature within predetermined limits.

The secondary refrigerating system 32 comprises in general, a liquid refrigerant evaporator 66 formed preferablyby a plurality of flattened tubes 16 and 1i. 'Ihe tubes 1l and 1i are joined at their lower ends by a liquid refrigerant manifold 12 and at their upper ends by exhaust manifolds 1I and 16 respectively Preferably the dattened tubes and manifolds are sweated to the inner metal lining which forms the food compartment 26. The evaporator substantially surrounds the food compartment lining member by extending the tubes and 1I around the bottom and side walls thereof. Obviously the tubes 1li and 1| could be extended over the top and rear walls of the lining if desired. The exhaust manifold 16 is provided with a conduit 18 which leads to a coiled pipe 60 forming the condenser within the shell 31.

vThe manifold 14 is provided withafconduit 82 uniformly cooled by such arrangement to thus prevent the dehydration of foods stored therein. The operation of the secondary refrigerating system is -as follows: As the temperature in the food compartment 26 increases, the liquid re-V frigerant in the evaporator portion formed by the loops 10 and 1i vaporizes and rises to the manifolds 'il and i6 whence the gas through ,.n mm mmmmmmmm www www www mmm. Mmmm@ .Umwmwmmmmmmmm Mmmm www www wwmwm mwmmmmmgwmMmmm@ M vm mw. mm ww mm, Mmmm@ Mm Mmmm mm Mmmwm www?? E www wim mmmmmmwmmmm m .mmmm mmmmmmmmmmmmmmmmm l .mi mmm... Mm m@ mmm www mmmmwmmwmmmm Mmmm mmmwmm, mmmmmmwmwmmmmw @www my www? www .mmm www im# .i mmwmmmmmlmmm mm. mm:. m

exchange relation with said second compartment, in direct contact with said i'lrst named evapo- A a condenser connected to said second named evaporator, said condenser being arranged in direct contact with a. portion of said rst named evaporator.

6. Reirigerating apparatus including a plurality of vertically extending insulating walls forming an enclosure coextensive in width and depth substantially throughout the height thereof, an imperforate partition element extending horizontally between said walls and dividing said enclosure into upper and lower food storage compartments, saidcompartments being substantially coextensive in width and depth, an evaporatorsecond evaporator, said condenser being located rator.

'1. Refrigerating apparatus including a cabinet having three compartments formed therein, a motor and compressor located in one of said compartments, said other compartments being provided with insulating Ywalls and being arranged substantially coextensive in width and depth throughout their height, an evaporator for one oi said insulated compartments,` said evaporator having a portion thereof for the manufacture oi ice and another portion thereof disposed in direct` contact with air within said compartment, a metallic liner Yfor the second compartment, an evaporator located in direct contact with the exterior surface of said liner, a condenser con- 'nected to said second named evaporator, said condenser being located indirect contact with av 

